EP 0199825 A4 19880704 - METHOD OF MANUFACTURING A SELF-DRILLING SCREW.
Title (en)
METHOD OF MANUFACTURING A SELF-DRILLING SCREW.
Title (de)
VERFAHREN ZUR HERSTELLUNG VON SELBSTSCHNEIDENDEN SCHRAUBEN.
Title (fr)
PROCEDE DE FABRICATION D'UNE VIS AUTOTARANDEUSE.
Publication
Application
Priority
JP 23400084 A 19841105
Abstract (en)
[origin: US4793220A] PCT No. PCT/JP85/00610 Sec. 371 Date Jun. 3, 1986 Sec. 102(e) Date Jun. 3, 1986 PCT Filed Nov. 2, 1985 PCT Pub. No. WO86/02867 PCT Pub. Date May 22, 1986.A method of making the drill-shaped cutting tool and its thread rolling die by which the workpiece such as the wire rod is rolled. The thread rolling die has a majority of uneven parts for forming the drill part formed by an electric discharge. The electrode for electric discharge machining is equipped with a pair to undergo the electric discharge and is formed to be approximately drill-shaped by forming the groove like uneven parts at least on the approximately cylindrical body possessing the diameter approximately equal to that of the drill part of the cutting tool to be made, and is then rotated and moved in parallel with the thread rolling die.
IPC 1-7
IPC 8 full level
B21H 7/10 (2006.01); B21H 3/00 (2006.01); B21H 3/02 (2006.01); B21H 3/06 (2006.01); B21H 3/10 (2006.01); B21K 5/20 (2006.01); B23H 9/00 (2006.01)
CPC (source: EP KR US)
B21H 3/027 (2013.01 - EP US); B21K 5/20 (2013.01 - KR); B23H 9/00 (2013.01 - EP US)
Citation (search report)
- No relevant documents have been disclosed.
- See references of WO 8602867A1
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
US 4793220 A 19881227; DE 3586784 D1 19921203; DE 3586784 T2 19930318; EP 0199825 A1 19861105; EP 0199825 A4 19880704; EP 0199825 B1 19921028; JP H0465739 B2 19921021; JP S61111740 A 19860529; KR 860003862 A 19860613; KR 900005408 B1 19900730; WO 8602867 A1 19860522
DOCDB simple family (application)
US 87418086 A 19860603; DE 3586784 T 19851102; EP 85905434 A 19851102; JP 23400084 A 19841105; JP 8500610 W 19851102; KR 850008209 A 19851104